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SearchEngine27
Joined: 21 Jun 2012
Posts: 66
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 Posted: Thu Jul 12, 2012 9:21 pm Post subject: java.lang.NoClassDefFoundError - external library copied and trimmed in dist/lib |
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I'm building a jar file that has several external dependencies and I want to package them all up into one jar, because eventually I will be serving them up via Java WebStart, and I want to make it just one file that is transferred. So, in the project build.xml, I put in the following:
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<target name="-post-jar">
<jar jarfile="${dist.jar}" update="true">
<zipfileset src="${dist.jar}" includes="**/*.class" />
<zipgroupfileset dir="dist/lib" includes="*.jar" excludes=""/>
<manifest>
<attribute name="Main-Class" value="LucentZUI.DocumentViewer"/>
</manifest>
</jar>
</target>
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and that does exactly what its supposed to. The problem I encountered was when I try to run the jar without NetBeans. I get a NoClassDefFoundError thrown, which didn't seem right. So I examined the jar file that was created, and sure enough its not there. But the problem wasn't with my logic, the problem was that in the dist/lib folder, there is a smaller version of the original jar.
The original jar file has all the required classes, but when NetBeans copies it into the dist/lib folder, it doesn't take all the classes in the jar.
Why does this happen? How can I fix it? and why don't I run into problems with this when I run the jar from the ide (since it is still missing the classes)?
Thanks. |
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SearchEngine27
Joined: 21 Jun 2012
Posts: 66
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| Posted: Fri Jul 13, 2012 2:37 pm Post subject: |
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So I figured it out. I was under the impression that the build-impl.xml file specified some odd library copying for ant, but it was actually library conflicts.
I was using ICEPdf, and Batik, and ICEPdf uses Batik libraries as well, but they use older versions so when Netbeans built my project, somehow it did it in a way that was OK, but when I took the libraries and placed them all into the same jar, somehow that screwed it up. I still don't fully understand how I would not get the same exception while running from netbeans though. As I said, the classes were still missing |
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